... solar water heater 2:Aluminum Alloy frame 3:CCC,CE,ISO9001:2000 4:Produce as customer's requirment Low pressurized solar water heaterSpecifications1.Solar ... 3.OEMIt is one of the most common used solar water heating system for household, hotel, hospital, project ... compact system is non-pressurized, water flow depending on gravity water head. This system matched with vacuum tube solar collector. Water ...